Sources

Domski , Mary
"Newton , Sir Isaac"
World Book Student
2012
8 May 2012
http://www.worldbookonline.com/student/article?id=ar390180&st=sir+isaac+newton

Richard S. Westfall
"Newton , Sir Isaac"
Student Research Center
1994-2012
10 May 2012
http://web.ebscohost.com/src/detail?vid=4&hid=24&sid=99095c05-eade-46d5-a2d9-78ccc78f0c02%40sessionmgr12&bdata=JnNpdGU9c3JjLWxpdmU%3d#db=mih&AN=32419204



Alfred Rupert Hall
"Sir Isaac Newton"
Microsoft Encarta
1998
11 May 2012
http://www.worldbookonline.com/student/article?id=ar390180&st=sir+isaac+newton